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<td ><a href="../qtdoc/index.html">Qt 5.12</a></td><td ><a href="qtqml-index.html">Qt QML</a></td><td ><a href="qtqml-qmlmodule.html">QML Types</a></td><td >String QML 类型</td></tr></table><table class="buildversion"><tr>
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<h3><a name="toc"><span lang="zh-cn">目录</span></a></h3>
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<li class="level1"><a href="#methods"><span lang="zh-cn">方法</span></a></li>
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<h1 class="title">String QML<span lang="zh-cn"> 类型</span></h1>
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<p>String对象表示一个字符串值。 <a href="#details"><span lang="zh-cn">更多</span>...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> <span lang="zh-cn">导入语句：</span></td><td class="memItemRight bottomAlign"> import QtQml 2.12</td></tr></table></div><ul>
<li><a href="qml-qtqml-string-members.html">所有成员的列表，包括继承成员</a></li>
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<li class="fn">string <b><b><a href="qml-qtqml-string.html#arg-method">arg</a></b></b>(<i>value</i>)</li>
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<p>QML String对象通过<a href="qml-qtqml-string.html#arg-method">arg()</a>函数扩展了JS 
String对象。</p>
<p><b>请参考 </b>
<a href="http://www.ecma-international.org/publications/standards/Ecma-262.htm">
ECMAScript语言规范</a><span lang="zh-cn">。</span></p>
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<h2><span lang="zh-cn">方法文档</span></h2>
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<a name="arg-method"></a><span class="type"><a href="qml-string.html">string</a></span> <span class="name">arg</span>(<i>value</i>)</p></td></tr>
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</div><div class="qmldoc"><p>返回此字符串的副本，并将最低编号的位标记替换为值，即%1，%2，…, % 
		99。下面的示例打印出“There are 20 items”</p>
<pre class="cpp">

  var message <span class="operator">=</span> <span class="string">&quot;There are %1 items&quot;</span>
  var count <span class="operator">=</span> <span class="number">20</span>
  console<span class="operator">.</span>log(message<span class="operator">.</span>arg(count))

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